Question

Dada a função abaixo, calcule f (x)= 5
F (x)= log2 (x+2)

( ) 30

( ) 28

( ) 36

( ) 42

Answer 1

$f(x) = 5\\f(x) = log_{2} (x+2)\\log_{2} (x+2) = 5\\2^5 = x + 2\\2^5 - 2 = x\\32-2 = x\\x = 30$